The telegraph dictionary, and seamen's signal book, adapted to signals by flags or other semaphores; and arranged for secret correspondence, through Morse's electro-magnetic telegraph: for the use of commanders of vessels, merchants, &c.

The telegraph dictionary, and seamen's signal book, adapted to signals by flags or other semaphores; and arranged for secret correspondence, through Morse's electro-magnetic telegraph: for the use of commanders of vessels, merchants, &c.

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